SWRS272E April   2023  – September 2024 CC2340R2 , CC2340R5

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Functional Block Diagram
  6. 5 Device Comparison
  7. 6 Pin Configurations and Functions
    1. 6.1 Pin Diagrams
      1. 6.1.1 Pin Diagram—RKP Package (Top View)
      2. 6.1.2 Pin Diagram – RGE Package (Top View)
      3. 6.1.3 Pin Diagram—YBG Package (Top View)
    2.     12
    3. 6.2 Signal Descriptions
      1.      14
      2.      15
      3.      16
      4.      17
      5.      18
      6.      19
      7.      20
      8.      21
      9.      22
      10.      23
      11.      24
      12.      25
      13.      26
      14.      27
      15.      28
      16.      29
      17.      30
      18.      31
    4. 6.3 Connections for Unused Pins and Modules
  8. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  DCDC
    5. 7.5  Global LDO (GLDO)
    6. 7.6  Power Supply and Modules
    7. 7.7  Battery Monitor
    8. 7.8  Temperature Sensor
    9. 7.9  Power Consumption - Power Modes
    10. 7.10 Power Consumption - Radio Modes
    11. 7.11 Nonvolatile (Flash) Memory Characteristics
    12. 7.12 Thermal Resistance Characteristics
    13. 7.13 RF Frequency Bands
    14. 7.14 Bluetooth Low Energy - Receive (RX)
    15. 7.15 Bluetooth Low Energy - Transmit (TX)
    16. 7.16 Zigbee and Thread - IEEE 802.15.4-2006 2.4 GHz (OQPSK DSSS1:8, 250 kbps) - RX
    17. 7.17 Zigbee and Thread - IEEE 802.15.4-2006 2.4 GHz (OQPSK DSSS1:8, 250 kbps) - TX
    18. 7.18 Proprietary Radio Modes
    19. 7.19 2.4 GHz RX/TX CW
    20. 7.20 Timing and Switching Characteristics
      1. 7.20.1 Reset Timing
      2. 7.20.2 Wakeup Timing
      3. 7.20.3 Clock Specifications
        1. 7.20.3.1 48 MHz Crystal Oscillator (HFXT)
        2. 7.20.3.2 48 MHz RC Oscillator (HFOSC)
        3. 7.20.3.3 32 kHz Crystal Oscillator (LFXT)
        4. 7.20.3.4 32 kHz RC Oscillator (LFOSC)
    21. 7.21 Peripheral Characteristics
      1. 7.21.1 UART
        1. 7.21.1.1 UART Characteristics
      2. 7.21.2 SPI
        1. 7.21.2.1 SPI Characteristics
        2. 7.21.2.2 SPI Controller Mode
        3. 7.21.2.3 SPI Timing Diagrams - Controller Mode
        4. 7.21.2.4 SPI Peripheral Mode
        5. 7.21.2.5 SPI Timing Diagrams - Peripheral Mode
      3. 7.21.3 I2C
        1. 7.21.3.1 I2C
        2. 7.21.3.2 I2C Timing Diagram
      4. 7.21.4 GPIO
        1. 7.21.4.1 GPIO DC Characteristics
      5. 7.21.5 ADC
        1. 7.21.5.1 Analog-to-Digital Converter (ADC) Characteristics
      6. 7.21.6 Comparators
        1. 7.21.6.1 Ultra-Low Power Comparator
    22. 7.22 Typical Characteristics
      1. 7.22.1 MCU Current
      2. 7.22.2 RX Current
      3. 7.22.3 TX Current
      4. 7.22.4 RX Performance
      5. 7.22.5 TX Performance
      6. 7.22.6 ADC Performance
  9. 8 Detailed Description
    1. 8.1  Overview
    2. 8.2  System CPU
    3. 8.3  Radio (RF Core)
      1. 8.3.1 Bluetooth 5.3 Low Energy
      2. 8.3.2 802.15.4 (Thread and Zigbee)
    4. 8.4  Memory
    5. 8.5  Cryptography
    6. 8.6  Timers
    7. 8.7  Serial Peripherals and I/O
    8. 8.8  Battery and Temperature Monitor
    9. 8.9  µDMA
    10. 8.10 Debug
    11. 8.11 Power Management
    12. 8.12 Clock Systems
    13. 8.13 Network Processor
  10. 9 Application, Implementation, and Layout
    1. 9.1 Reference Designs
    2. 9.2 Junction Temperature Calculation
  11. 10Device and Documentation Support
    1. 10.1 Device Nomenclature
    2. 10.2 Tools and Software
      1. 10.2.1 SimpleLink™ Microcontroller Platform
    3. 10.3 Documentation Support
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2 Junction Temperature Calculation

This section shows the different techniques for calculating the junction temperature under various operating conditions. For more details, see Semiconductor and IC Package Thermal Metrics.

There are two recommended ways to derive the junction temperature from other measured temperatures:

  1. From package temperature:
    Equation 1. T J = ψ JT × P + T case
  2. From board temperature:
    Equation 2. T J = ψ JB × P + T board

P is the power dissipated from the device and can be calculated by multiplying current consumption with supply voltage. Thermal resistance coefficients are found in Thermal Resistance Characteristics.

Example:

In this example, we assume a simple use case where the radio is transmitting continuously at 0dBm output power. Let us assume we want to maintain a junction temperature equal or less than 85°C and the supply voltage is 3V. Using Equation 1, the temperature difference between the top of the case and junction temperature is calculated. To calculate P, look up the current consumption for Tx at 85°C. At 85°C the current consumption is approximately 5.5mA. This means that P is 5.5mA × 3V = 16.5mW.

The maximum case temperature to maintain and junction temperature of 85°C is then calculated as:

Equation 3. T case < Tj-0.4°CW×23.4mW= 84.99°C

For various application use cases, current consumption for other modules may have to be added to calculate the appropriate power dissipation. For example, the MCU may be running simultaneously as the radio, peripheral modules may be enabled, and so on. Typically, the easiest way to find the peak current consumption, and thus the peak power dissipation in the device, is to measure as described in the Measuring CC13xx and CC26xx Current Consumption application report.